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Analog Devices Inc./Maxim Integrated MAX6795TPWD3+
- Part No.:
- MAX6795TPWD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX6795TPWD3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,499
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Product details
Overview
The MAX6795TPWD3+ from Maxim Integrated is a single-output, high-voltage linear regulator with integrated supervisory functions (RESET, watchdog, power-fail detection, and hold control), designed for automotive systems requiring robust operation under load-dump conditions. It delivers up to 300mA at fixed 5V/3.3V/2.5V/1.8V or adjustable 1.8V–11V output, features 68μA quiescent current, 5V–72V input range, and operates from –40°C to +125°C.
For engineers reviewing the MAX6795TPWD3+ datasheet, MAX6795TPWD3+ pinout, MAX6795TPWD3+ application, or MAX6795TPWD3+ equivalent, this page provides verified technical context, exact pin functionality, automotive-grade thermal and protection specs, and validated alternative options for AEC-Q100-compliant power management design.
Technical Context
The MAX6795TPWD3+ implements a single LDO regulator with internal pFET pass element, supporting dropout as low as 1200mV at 300mA (5V output, VIN = 6V). Its supervisory block integrates a fixed-threshold (92.5% of VOUT) active-low RESET output with capacitor-adjustable timeout (D3 = 50ms nominal), a watchdog timer with fixed 280ms timeout (CSWT tied to OUT), and a HOLD input enabling self-holding latch behavior without external components.
It includes reverse-battery protection via GATEP-driven p-channel MOSFET, thermal shutdown at +165°C with 20°C hysteresis, short-circuit current limiting (~480mA), and output overvoltage protection clamping at 1.1×VOUT. The device uses an internal 1.231V reference for PFI comparator and SET feedback, ensuring stable regulation across its full temperature and input voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 72V - withstands automotive load-dump transients without external protection. |
| Quiescent Current | 68μA typical - enables always-on ECU modules with ultra-low standby power. |
| Output Current | 300mA max - sufficient for powering microcontrollers, CAN transceivers, and sensors in body control units. |
| Dropout Voltage | 1200mV typ at 300mA (5V out, VIN = 6V) - ensures regulation during cold-crank battery dips. |
| Reset Timeout | 50ms nominal (D3 option) - meets ISO 16750-2 power interruption recovery timing requirements. |
| Operating Temperature | –40°C to +125°C - fully specified for under-hood automotive environments. |
| Watchdog Timeout | 280ms min (fixed, CSWT = OUT) - provides reliable microcontroller supervision without external timing components. |
Pinout & Package
MAX6795TPWD3+ is housed in a 20-pin, 5mm × 5mm thermally enhanced TQFN-EP package with exposed pad (EP) connected internally to GND. The package supports up to 2.7W continuous power dissipation and is AEC-Q100 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT | Regulator output (5V/3.3V/2.5V/1.8V preset or adjustable 1.8V–11V); requires ≥10μF ceramic capacitor to GND. |
| 3 | SET | Feedback input; tie to GND for preset output, or connect resistive divider for adjustable output. |
| 4 | PFO | Active-low open-drain power-fail output; asserts when PFI falls below 1.231V threshold. |
| 5 | CSWT | Watchdog timeout adjust input; tied to OUT for fixed 280ms timeout (as configured in MAX6795TPWD3+). |
| 6 | CSRT | Reset timeout adjust input; tied to OUT for fixed 50ms timeout (D3 option per ordering code). |
| 7 | GND | Analog/digital ground reference; connect EP pad directly to PCB ground plane for thermal performance. |
| 8 | RESET | Active-low reset output (push-pull); asserts when OUT drops below 92.5% of nominal voltage. |
| 11 | WDI | Watchdog input; rising/falling edge must occur within 280ms to prevent reset assertion. |
| 12 | HOLD | Active-low hold input; forces regulator ON even after ENABLE goes low - enables self-holding circuit. |
| 16 | PFI | Power-fail comparator input; use external resistor divider to set custom brownout threshold (e.g., battery monitoring). |
| 17, 18 | IN | Main regulator input; bypass with ≥1μF ceramic capacitor to GND near pins. |
| 19 | GATEP | pFET gate drive output; drives external p-channel MOSFET for reverse-battery protection (no diode drop). |
| 20 | ENABLE | Active-high enable input; internally pulled down (0.5μA sink); logic high required to activate regulator. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 68μA enables >10-year battery life in always-on automotive modules (e.g., telematics, alarm systems). |
| Integrated reverse-battery protection | GATEP output drives external pFET - eliminates series diode, preserving efficiency and reducing heat. |
| Self-holding latch via HOLD input | Eliminates need for external latching circuitry in ignition-controlled power rails (e.g., BCM wake-up paths). |
| Adjustable power-fail detection | PFI input with 1.231V reference allows precise battery voltage monitoring (e.g., <11.5V warning before cranking). |
| AEC-Q100 qualified operation | Rated for –40°C to +125°C with thermal shutdown (+165°C) and hysteresis - suitable for engine compartment deployment. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
|
Use Scenario: Powers microcontroller, LIN transceiver, and door-lock actuators in vehicle body electronics with ignition-switched input. IC Role / Device Role / Timing Role: Primary 5V/3.3V LDO with integrated RESET and watchdog - ensures deterministic boot and runtime fault recovery. Use Value: HOLD input enables latched power-on after key turn; 72V tolerance prevents damage during jump-start or alternator surge. |
Use Scenario: Supplies clean, regulated 3.3V to image sensor and ISP in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Single-output LDO with power-fail detection (PFI) and fast RESET - triggers graceful shutdown before battery collapse. Use Value: 68μA IQ extends parking-mode runtime; 50ms RESET timeout aligns with camera firmware initialization sequence. |
| Telematics Control Unit (TCU) | Electronic Parking Brake (EPB) Controller |
|
Use Scenario: Provides always-on 3.3V rail for cellular modem and GNSS receiver in connected car platforms. IC Role / Device Role / Timing Role: Supervisory LDO with watchdog and reverse-battery protection - maintains secure communication during battery disconnect/reconnect. Use Value: GATEP-driven pFET blocks reverse current; 280ms watchdog timeout prevents modem lockup without host intervention. |
Use Scenario: Delivers 5V to motor driver IC and MCU in safety-critical EPB actuation system. IC Role / Device Role / Timing Role: AEC-Q100-compliant LDO with thermal shutdown and output overvoltage protection - meets ASIL-B functional safety requirements. Use Value: +165°C thermal shutdown with 20°C hysteresis prevents latch-up during brake motor stall; 300mA output supports dual H-bridge drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage supervisory LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6795TPSD2/V+ | Same 300mA single-output LDO, but with 3.3V fixed output and 12.5ms reset timeout (D2); AEC-Q100 qualified (/V+ suffix). | Targeted at 3.3V-only systems needing shorter reset hold time (e.g., fast-boot infotainment). | Select when fixed 3.3V output and AEC-Q100 compliance are mandatory, and 12.5ms reset suffices. |
| TLV70733PDQNR | 300mA LDO with 2.5V–5.5V input, 25μA IQ, no integrated watchdog/RESET/PFI - requires external supervision. | Limited to low-input-voltage subsystems (e.g., post-DCDC 3.3V rail); not suitable for direct battery connection. | Choose only for cost-sensitive, non-automotive applications where external reset ICs are acceptable and input stays <5.5V. |
Compared with MAX6795TPWD3+, MAX6795TPSD2/V+ offers identical architecture and AEC-Q100 qualification but targets 3.3V systems with faster reset release, while TLV70733PDQNR lacks supervision and high-voltage capability - making it unsuitable as a drop-in replacement in automotive battery-fed designs.
Availability
MAX6795TPWD3+ is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera power, telematics control units, and electronic parking brake controllers requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX6795TPWD3+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and automotive applications.
The MAX6795TPWD3+ belongs to the MAX6791–MAX6796 family of high-voltage micropower regulators with integrated supervision - engineered specifically for automotive power rails that must survive load dump, cold crank, and reverse-battery conditions while minimizing standby current.
FAQ
What output voltage does the MAX6795TPWD3+ deliver?
The MAX6795TPWD3+ delivers a fixed 5V output. Its ordering code "WD3" indicates W = 5V preset output, D3 = 50ms reset timeout period. The device does not support adjustable output in this configuration - SET must be tied to GND, and no external feedback divider is required for nominal operation.
Is the MAX6795TPWD3+ AEC-Q100 qualified?
No, the MAX6795TPWD3+ is not AEC-Q100 qualified. The /V+ suffix (e.g., MAX6795TPLD2/V+) denotes AEC-Q100 qualification. MAX6795TPWD3+ is rated for –40°C to +125°C and built on automotive-grade process, but lacks formal AEC-Q100 test documentation. For safety-critical applications, select MAX6795TPSD2/V+ or MAX6795TPLD2/V+ instead.
How is the 50ms reset timeout implemented in the MAX6795TPWD3+?
The MAX6795TPWD3+ achieves its 50ms reset timeout by connecting the CSRT pin internally or externally to the OUT pin - matching the D3 option defined in the datasheet. This configures the internal ramp generator to produce a 50ms (nominal) delay after VOUT rises above the 92.5% reset threshold before deasserting the RESET signal.
Can the MAX6795TPWD3+ drive a p-channel MOSFET for reverse-battery protection?
Yes, the MAX6795TPWD3+ includes a dedicated GATEP output pin that sources up to 12V (at VIN = 20V) to drive the gate of an external p-channel MOSFET. This enables efficient reverse-battery protection without series diode losses - critical for maintaining >95% efficiency in 12V automotive systems.
What is the function of the HOLD pin on the MAX6795TPWD3+?
The HOLD pin on the MAX6795TPWD3+ is an active-low input that enables self-holding behavior: once ENABLE goes high and the regulator starts, pulling HOLD low keeps the output ON even if ENABLE subsequently returns low. Releasing HOLD (to high or open) shuts down the regulator - allowing ignition-key-triggered latching without external components.
MAX6795TPWD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Regulator/Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.665V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX6795TPWD3+ FAQ
1.How can I place an order for MAX6795TPWD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6795TPWD3+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6795TPWD3+ reliable?
The price and inventory of MAX6795TPWD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6795TPWD3+ is usually 5 days.
3.What payment methods are accepted for MAX6795TPWD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6795TPWD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6795TPWD3+?
MAX6795TPWD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6795TPWD3+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6795TPWD3+?
For technical support, including MAX6795TPWD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6795TPWD3+ requirements.
6.How does Aetrix verify that MAX6795TPWD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6795TPWD3+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6795TPWD3+ meets industry standards.
7.What is the process for return or replacement of MAX6795TPWD3+?
All MAX6795TPWD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6795TPWD3+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6795TPWD3+ part is unused and in its original packaging.
Return procedure for MAX6795TPWD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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